AFR`s 335cc heads are designed feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for radical street/strip or "Pro Street" builds with displacements up to 572 cubic inches, operating up to 7000 RPM. Component upgrades and machining options are available to customize AFR Heads to your specific build.
AFR's Best of Both Solution Are you looking for big torque
and big horsepower number? AFR's BB Chevy line of medium volume
intake runners will provide you with exactly that. The phrase
"having your cake and eating it to" would certainly be appropriate
with their moderately sized intake runners producing tremendous
flow figures across the entire lift range (Our CNC 335 flows 410
CFM!). These high flow/high velocity ports provide extreme
versatility and fill the needs of many applications. From a
max-effort high compression 454 to a 605 CID low rpm marine
application, either one of these cylinder heads would be a great
choice. These heads would also be ideal in a larger cubic inch
"Pro-Street" application with their broad torque range, as well as
significant rpm and horsepower capability. These heads will work
best with a primary operating range of 3000-7000 rpm’s (This range
is an average and will vary with engine displacement as well as
component selection). These 335cc heads come standard with AFR’s
trademark .750" thick head deck, and reinforced rocker stud
bosses. Standard combustion
chamber volume is 121cc for our 335cc BBC. Properly selecting the
correct cylinder head for an application depends on a large number
of variables. Please consult with one of our sales technicians to
assist you in making the best decision for your particular
application.
Note: Optional stud girdle required for 2° rolled valve angles and
1" longer head bolts needed on four bottom exhaust bolt holes.
Longer pushrods might also be required.
color="#ffffff" size="4">Basic Package Components |
color="#ffffff" size="4">Part # |
100%
CNC
Ported Chambers, Exhaust, and Intake
Competition 5-angle Valve Job |
|
color="#ffffff" size="4">Specifications, Features, and
Optional Supporting Components |
Head Torque |
75 ft.
lbs |
Intake Port Gasket |
AFR
#6853
(.120"
Thick)
or AFR #6855
(.060" Thick) |
Exhaust
Port
Gasket |
AFR #6858
|
Head Gasket, Fel-Pro
#1047 (Mark V and VI) |
AFR #6849 |
Head
Gasket, Fel-Pro #1017-1 (Mark IV) |
AFR #6350 |
Head Bolts, ARP
135-3703 (Mark IV) |
AFR #6306 |
Head
Bolts, ARP 135-3707 (Mark V) |
AFR #6308
|
Head Studs, ARP
235-4713 |
AFR #6307 |
Head
Bolt Washers, Manley |
AFR #6320 |
Suggested Manifold
|
Super
Victor Victor Jr.,
|
Spark Plug
Starting Range |
style="float: right;">Autolite 3932 |
Combustion Chambers |
121cc w/ CNC Chambers |
Valve
Spring Pocket Diameter |
style="float: right;">1.725 O.D
|
Intake Port Dimension |
2.455"H
x
1.755"W x 13/32 Radius |
Exhaust
Port
Dimension |
style="float:right;">1.780"H x 2.025" W |
Valve Angle |
24°/4°
Intake,
15°/4° Exhaust |
Angle Mill
|
style="float:right;">.009" per cc/Maximum 104cc |
Flat Mill
|
.006"
per
cc/ Maximum 114cc |
Stud
Girdle, (AFR Specific) |
AFR #6202
|
Important: color="#000000" face="Arial">Optional stud girdle
required for 2° rolled valve angles and 1" longer head
bolts needed on four bottom exhaust bolt holes. Longer
pushrods might also be required.
Note: color="#000000" face="Arial">Angle mills might require
a .120" thick intake gasket. color="#000000" face="Arial"> Angle mills might require a
.120 thick intake gasket.
